Mich. Comp. Laws § 107.1: City lighting plant.

Sec. 1.

It shall be lawful for any city incorporated or reincorporated under the provisions of this act to acquire by purchase or to construct, operate and maintain, either independently or in connection with the waterworks of such city, either within or without the city, works for the purpose of supplying such city and the inhabitants thereof, or either, with gas, electric or other lights at such times and on such terms and conditions as hereinafter provided.